Vulcanizing apparatus



Dec. 7 1926.

H. SCHL OTTHAUER VULCANI Z ING APPARATUS Filed August 2, 192:: 2 Sheets-Sheet 1 INVENTOR- Dec. 7., 1926. 1,609,575

H. SCHLOTTHAUER VULCANIZING APPARATUS Filed August 2, 192: 2 Sheets-Sheet 2 5 P Z0 7 g 20 5 20 206 H ZOF 2o- 17 [7 BEA.

hTl-orv q Patented Dec. 7, 1926.

HERMAN SCHLOTTI-IAUER, or cnicnco, ILLINOIS, Assre'non TOCOLUMBIATNDUS- TRIAL MAcHInnaY'oo vrrAnY, or on:

NoIs.

CAGO, rrjmnors, noonronArron or rrnr- VULGANIZING APPARATUS.

"Application filed August 2, 1923. Serial No. 655,192.

This invention relates tovulcanizing apparatus for use in connection with rubber inner tubes for tires and the like.

It is the object of the invention a vulcanizing apparatus which shall be simple in construction and operation and which shall include a novel clamping arrangement.

Another object of the invention is toprovide adjustable means for conveniently retaining the material vulcanized against the heating plate.

Another object of the invention resides in the novel clamp construction which in cludes a clamp having a semi-circular bearing onthe upper half portion of its support and having'an integral edge of said bearing extending upwardly in close proximity to the bottom or the heating plate, whereby the tightening of one or more clamps will not aii'ect the other clamps.

' A still further object is to provide novel means for retaining and sealing the electric terminal wires in the water chamber.

Other objects will be apparent from the description whichis to follow. I

In the illustrations, in which like reference characters indicate like or corresponding parts,

Fig. 1, is a sideelevationor' a vulcanizing device embodying one form of my invention.

Fig. 2, is a plan viewof same.

Fig. 3 is a cross section taken on line 8-3 of Fig. 1. l

Fig. 4:, is an enlarged vertical section of the automatic steam pressure control, and

Fig. 5, is a plan view thereof.

Fig. 6, illustrates a part'cross section of the water chamber showing the electric wire terminals and my improved retainer and seal for same.

Referring to the drawings, 10 indicates a. rectangular heating plate which consists of ahollow cast body providing an interior water chamber 10 and having a cover 11 which is connected to; the body with cap screws 12 to completely seal the chamber 10".

At one end of the heating plate 10, I provide a steam pressure gauge 13 having a connection 1 1 with the interior of the water chamber and a safety pop valve 15, also having a connection 16 with the water chamber. V i

The cover plate 11 carries an electric heating element or coil 17 the ends of which to provide extend through the cover 11 into frustoconical sleeves 18, which are wedged into the openings ofthe cover 11 to provide 'a sealed oint. a a

The electric heating element 17- comprises a nichrome resistance wire coil 17 having direct connection with the terminal plugs 19 and suitable insulating elements 17 mounted in a copper tube 17 For the purpose of controlling the steam pressure within the chamber 10 I provide in the electric current circuit an automatic steam pressure control switch 20, which consists of a flexible diaphragm 20 securely held between flanges 20 and 20 by screws 20?. The flange 20 is provided with a pipe connection 20 communicating with the steam pipe 20*, which is connected to the steam chamber 10 The flange 20 has an upwardly disposed chamber 20 which terminates in a smaller chamber 20 Mounted wvithin the chamber 20 and 20 is avertically movable pin .ZO the upper end of which extends through an opening in top ofthe chamber 20 and to which is mounted a head 20 of insulating material. 7

The lower endof the pin QO carries a disk like head 2O which is retained in constant contact with the diaphragm 20 by means of a coil spring 20 Mounted on the exterior of the flange 20 is a tubular supporting member 20 of insulating material. Secured to the supporting member 20 is contact bar 20 of electrically conductive material carrying a contact plate 20 which co-operates with bar 20 also 01";

electrically conducctive material, the upper end of which is bent over at right angles and carries the contact plate 20". Normally the contact plates 20 and QO are in contact. The bar 20 carries a vertically adjustable screw 20 The electric circuit passes through the switch 20 with one of the terminals having connection with one o1 screws 20 the terminals 19 is connected to'the other screws 20 .(See Fig. 1.) 7

It is now apparent that as the steam pressure increases within the chamber 10 due to the heat of the submerged heating coil 17, V

the pressure will act against the diaphragm 20 and will gradually raise the plate, 20

One of r and pin 20 so that its insulated head 20 will contact with the screw 20.

Further I ill pressure against the screw 20* will raise the horizontally disposed spring portion of the bar 20 to break the contact between the plates 20 and thus breaking the circuit to the heating element 17. It is now obvious that the maximum steam pressure within the chamber 1O can readily be controlled v the automatic switch 20, and that this maximum pressure can be varied by the adjustment screw 20 as the distance between its lower end and the head 2O controls the breaking of the contact points in the circuit.

In order to provide means for determining the desirable minimum and maximum water levels in the chamber 10, Ihave shown two cocks 21 and 22. The minimum or lowest level should not be below the cock 21 and the highest level not over the cock 22, by this control of levels the burning out of the heating elements is avoided, likewise the under curing of the tubes due to a chamber full of water is overcome.

In curing or vulcanizing patches to the tubes, the prepared tubes are placed under the blocks 23 held by the clamps with the surface to be vulcanized against the face of the heating plate 10.

Each clamp 24: comprises an arm 2% retaining a vertically adjustable screw 2%, the lower end of which is mounted for rotary movement within the swivel casting it which is mounted to the top of the wood block 23.

Suitable frames 25 are arranged for support of the heating plate 10. A rod 6 connects the frames 25 and extends longitudinally beneath the heating plate 10. The cap screws 25 pe 'mit the removal of the rod 26 for slidable mounting of the clamps it thereon. Referring to Figures 1 and 3, it will be observed that the lower end 24 ot' the clamps is formed with a semi-circular bearing resting on the rod 26 and that the tilting of the clamps is overcome by the close proximity of the edge 24: to the bottom of the heating plate 10.

The end of the tube 27 during curing can be supported 011 the detachable rack 28 which is mounted in sockets within the frames 25. i

I claim:

1. In a device of the kind described, the combination of a heating plate, a support below said heating plate extending longitudinally thereof, and a clamp having a tightening screw disposed above said plate, said clamp having a bearing on the upper half portion of said support and an extension of said bearing in close proximity to the bot tom of said plate whereby said clamp is free for upward movement to contact with said bearing extension against the bottom of said plate upon the tightening of said screw.

:2. In a device of the kind described, the combination of a heating plate, a support below said heating plate extending longitudinally thereof. and a plurality of clamps each having a tightening screw disposed above said plate, said clamps having a bearing on the upper half portion of said support and an extension of said bearing in close proximity to the bottom of said plate whereby said clamps are free for upward movement to contact with said bearing extensions against the bottom 01 said plate upon the tightening of said screws.

In witness whereof I aliix my signature.

HERMAN SCHIJOTTHAUEB. 

